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NCT01663935 · ClinicalTrials.gov registry record · Phase 2
Vision Response to Dopamine Replacement
A Phase 2 study, sponsored by University of Wisconsin, Madison.
- Terminated
- Registry status
- Phase 2
- Development phase
- 20
- Enrollment target
NCT01663935: Clinical Trial Phase 2 study, sponsored by University of Wisconsin, Madison.
NCT01663935 is a Phase 2 study that was terminated before completion, run by University of Wisconsin, Madison. The registered enrollment target is 20 participants, below the 133-participant average among 30,622 other Phase 2 trials with a reported enrollment target (85% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT01663935, a Phase 2 study, was terminated before completion, sponsored by University of Wisconsin, Madison.
- TERMINATED
- Registry status
- Phase 2
- Development phase
- 20 participants
- Enrollment target
Study Summary
The purpose of the study is to evaluate and document physiologic and functional changes in visual performance and retinal function of patients diagnosed with albinism (a dopamine deficiency state) following a trial of oral Levodopa/carbidopa treatment.
Primary Outcome
Change in visual acuity from baseline to 3 months as measured in logMAR by Snellen or Sweep visual evoked potential (SVEP). logMar lower values equals better visual outcome.
Interventions
- DRUG Levodopa/carbidopa
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 20 participants |
| Start Date | 2012-10-17 |
| Est. Completion | 2018-04-12 |
| Phase | Phase 2 |
Why NCT01663935 stopped before completion
NCT01663935 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 20 participants, a relatively small participant target, below the 133-participant average among 30,622 other Phase 2 trials with a reported enrollment target (85% lower).
The record links to 0 conditions, and to 1 intervention - of which Levodopa/carbidopa is the first listed.
NCT01663935 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT01663935 about?
NCT01663935 is a clinical study titled "Vision Response to Dopamine Replacement". The purpose of the study is to evaluate and document physiologic and functional changes in visual performance and retinal function of patients diagnosed with albinism (a dopamine deficiency state) following a trial of oral Levodopa/carbidopa treatment.
What is the current status of trial NCT01663935?
This trial is currently terminated. It is a Phase 2 study. The enrollment target is 20 participants. The study started on 2012-10-17. Estimated completion is 2018-04-12.
What interventions are being tested in trial NCT01663935?
The interventions under investigation include: Levodopa/carbidopa (DRUG).
Who is sponsoring clinical trial NCT01663935?
This trial is sponsored by University of Wisconsin, Madison, which has 1,039 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT01663935's enrollment target sits among peer trials
20 1805th of 2000 higher than 107 of 2,000 other Phase 2 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 2 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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